This is “HG-N” Premium filter(Not Lead removal). This advanced multi-stageactivated carbon filter is designed to effectively remove chlorine, sediments,and odor from your tap water. Provides clean, great-tasting water. Made inKorea. It is compatible with all Leveluk series, DX, Jr., SD-501, DXII, Jr.II, Super 501 and Sunus (HG-N Newer model only), all Sanastec and Impart andmost Toyo water ionizers. By replacing new filter every 6 to 12 months willenhance the taste and alkalinity of your water. This filter will not fit toOlder HG model. It is very important to choose the right filter for your waterionizer. If your filter tray has two extra notches in the center hole (outlet)and not completely round, you have the HG-N type filter and this filter willfit to your machine. If your filter center nipple is completely round, youneed to buy ‘HG’ filter. Please verify whether you have the original modelfilter or the new HG-N model filter. Returns accepted if the item is still newand unused. Made in Korea